If you are in version 2.3.2 / 2.3.3 and if you use FTP to update InfiniteWP admin panel, you will encounter a bug introduced in the recent update.
To fix this, edit config.php and add/edit this line,
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define('APP_FTP_BASE', '/ftp/path/to/iwp_app');
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In the place of ftp/path/to/iwp_app, please enter your FTP path to the InfiniteWP Folder.
It will be fixed in 2.3.4 and you don't have to do this again.
If you find this complex, you can do a manual update here - infinitewp.com/knowledge-base/manual-update